A4 Quattro Sedan V6-2.8L (ACK) (1997)
Camshaft Position Sensor: Testing and Inspection
Camshaft Position (CMP) Sensor, Checking
NOTE:
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Camshaft Position (CMP) sensor -G40- is located on the rear of the left cylinder head (bank 2)
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Camshaft Position (CMP) sensor 2 -G163- is located on the front of the right cylinder head (bank 1).
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Checking -G163-. See: Camshaft Position (CMP) Sensor 2, Checking
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Component location. See: Fuel Delivery and Air Induction/Locations
Required special tools and test equipment
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VAG 1598/22 test box
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Multimeter US1119 (Fluke 83 or equivalent)
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VW1594 connector test kit
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Wiring diagrams
Checking
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Disconnect 3-pin harness connector from Camshaft Position (CMP) sensor.
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Connect multimeter US1119 (Fluke 83 or equivalent) to measure voltage across CMP connector terminals 1 (B+) and 3 (Ground), using adapters
from VW1594 connector test kit.
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Switch ignition on.
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Measure voltage between terminals 1 and 3.
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Specified value: 9 - 14.5 volts
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Switch ignition off.
If voltage is OK:
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Connect VAG 1598/22 test box to Motronic ECM harness connector.
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Check wiring for open circuit between ECM/test box and 3-pin harness connector, according to wiring diagram.
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Connector terminal 1 to ECM/test box socket 11
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Connector terminal 2 to ECM/test box socket 76
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Connector terminal 3 to ECM/test box socket 67
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Specified value: max. 1.5 ohms
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Check wiring for short circuit between ECM/test box and 3-pin harness connector, according to wiring diagram.
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Connector terminal 3 to ECM/test box socket 76
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Connector terminal 3 to ECM/test box socket 11
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Connector terminal 2 to ECM/test box socket 11
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Specified value: Infinity ohms
If wiring is OK (and voltage across terminals 1 and 3 is OK):
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Replace Camshaft Position (CMP) sensor.
If wiring is OK (but still no voltage across terminals 1 and 3:
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Replace Motronic ECM -J220-.
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Carry out adaptation of throttle valve control module to ECM.
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Check readiness code.
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If Diagnostic Trouble Code (DTC) memory has been erased, or ECM has been disconnected, generate new readiness code.